262 RHYNCHOPHORA. 
cylindrical shape and the infuscate front of the prothorax. It is smaller even than 
C. collaris, and has not the marked impression present on the elytral declivity of that 
species. 
[The following South-American species belong to Division II. :— 
Corthylus fuscus, sp. n. 
Fm. Oblonga, sat nitida, ferruginea vel picea ; fronte impressa, setis brevibus, erectis, flavis ornata; anten- 
narum clava minore, subrhomboidali, haud fimbriata; prothorace semielliptico, haud transverso, linea 
transversa, elevata, in disco vix distincta, parte posteriore subopaca; scutello magno; elytris sat dense 
subtiliter punctulatis, apice fortiter convexe declivi, utrinque haud impresso, subtiliter lineato-punctato, 
fere glabro. 
Long. 3°2 millim. 
Female. In appearance resembling C. comatus, but stouter and of lighter colour, ferruginous or inclining to 
piceous. Head with short, erect, yellow pubescence, not so dense as in that species; antennal club 
ferruginous, relatively small, subrhomboidal, the apex obliquely rounded, the inferior margin obtusely 
angulate near the base, sutures oblique, incomplete in the middle, the inner face rather shining, uniformly 
porous, its margin not fringed. Prothorax semielliptic, as long as broad, rather broadly rounded at apex 
and not constricted ; sides parallel towards the base, the latter truncate, margined ; surface with the 
transverse elevated line very indistinct, its hinder part subopaque, impunctate. Scutellum large, rounded 
triangular. Elytra scarcely one-half longer than the prothorax, sides subparallel, not narrowed behind, 
the apical margin broadly rounded; surface rather more finely and closely punctured than in C. comatus, 
apex strongly declivous, convex, non-impressed, with one or two substriate rows of fine punctures on each 
side and scattered fine hairs, the sutural margins slightly elevated. 
Hab. Braziu. 
I have three specimens from Brazil tobacco. The species cannot well be confused 
with any other, except perhaps C. castaneus, which is a longer and more slender insect 
with the elytral declivity more oblique and impressed on each side of the suture. 
Corthylus discoideus, sp. n. 
Pseudocorthylus redtenbacheri, var., Kerr. Borkenk. p. 60°. 
Mas. Oblongus, sat nitidus, rufo-testaceus, capite et prothoracis antica dimidia parte infuscatis, elytris postice 
et ad latera gradatim picescentibus ; statura fere C. collaris, prothoracis apice inermi, area basali nitida, 
levi, elytris paullo longioribus, ad apicem convexioribus, sat evidenter punctatis, punctis post medium 
in lineas ordinatis, declivitate convexa, tenuiter pilosa, haud evidenter impressa, sutura subelevata. 
Long. 1°8 millim. 
Hab. VenuzveE.a! (Mus. Vind. Ces.). 
This small species, which probably belongs to Division II., can be separated from 
any other by the size and colour alone. The declivity of the elytra shows a slight 
striate impression on each side of the suture, but not the deeper sulcus margined by 
an external callosity found in C. collaris.] 
